/**
 * LavaLamp - A menu plugin for jQuery with cool hover effects.
 * @requires jQuery v1.1.3.1 or above
 *
 * http://gmarwaha.com/blog/?p=7
 *
 * Copyright (c) 2007 Ganeshji Marwaha (gmarwaha.com)
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 *
 * Version: 0.2.0
 * Requires Jquery 1.2.1 from version 0.2.0 onwards.
 * For jquery 1.1.x, use version 0.1.0 of lavalamp
 */

/**
 * Creates a menu with an unordered list of menu-items. You can either use the CSS that comes with the plugin, or write your own styles
 * to create a personalized effect
 *
 * The HTML markup used to build the menu can be as simple as...
 *
 *       <ul class="lavaLamp">
 *           <li><a href="#">Home</a></li>
 *           <li><a href="#">Plant a tree</a></li>
 *           <li><a href="#">Travel</a></li>
 *           <li><a href="#">Ride an elephant</a></li>
 *       </ul>
 *
 * Once you have included the style sheet that comes with the plugin, you will have to include
 * a reference to jquery library, easing plugin(optional) and the LavaLamp(this) plugin.
 *
 * Use the following snippet to initialize the menu.
 *   $(function() { $(".lavaLamp").lavaLamp({ fx: "backout", speed: 700}) });
 *
 * Thats it. Now you should have a working lavalamp menu.
 *
 * @param an options object - You can specify all the options shown below as an options object param.
 *
 * @option fx - default is "linear"
 * @example
 * $(".lavaLamp").lavaLamp({ fx: "backout" });
 * @desc Creates a menu with "backout" easing effect. You need to include the easing plugin for this to work.
 *
 * @option speed - default is 500 ms
 * @example
 * $(".lavaLamp").lavaLamp({ speed: 500 });
 * @desc Creates a menu with an animation speed of 500 ms.
 *
 * @option click - no defaults
 * @example
 * $(".lavaLamp").lavaLamp({ click: function(event, menuItem) { return false; } });
 * @desc You can supply a callback to be executed when the menu item is clicked.
 * The event object and the menu-item that was clicked will be passed in as arguments.
 */
(function($) {
	$.fn.lavaLamp = function(o) {
		o = $.extend({ fx: "linear", speed: 500, click: function() {} }, o || {});

		return this.each(function() {
			var me = $(this), noop = function(){},
				$back = $('<li class="back"><div class="left"></div></li>').appendTo(me),
				$li = $('> li', this),
				curr = $('> a.active', $li).parent()[0];
			/*if (!curr) {
				curr = $li[0];
				$('> a', curr).addClass('active');
			}*/

			$li.not(".back").hover(
				function() { move(this); },
				typeof curr == "undefined" ?
					function() { $back.css({ width: '0px', left: '0px' }); } :
					function() { move(curr); }
			);

			/*$(this).hover(
				noop,
				function() {
					if (typeof curr == "undefined") {
						$back.css({ width: '0px', left: '0px' });
					}
					else {
						move(curr);
					}
				}
			);*/

			$li.click(function(e) {
				setCurr(this);
				return o.click.apply(this, [e, this]);
			});

			if (curr) {
				setCurr(curr);
			}

			function setCurr(el) {
				$back.css({ "left": el.offsetLeft+"px", "width": el.offsetWidth+"px" });
				curr = el;
			};

			function move(el) {
				$back
					.each(function() { $(this).dequeue(); })
					.animate(
						{ width: el.offsetWidth, left: el.offsetLeft },
						o.speed, o.fx
					);
			};
		});
	};
})(jQuery);